Sealing device for stirring tank and mixing machine

Abstract

The utility model belongs to the technical field of battery production, and particularly relates to a sealing device for a stirring tank and a mixing machine. The sealing device comprises a supporting seat, a dry gas sealing seat; the cover plate covers the lower end face of the dry gas sealing seat, and a first sealing cavity is defined by the cover plate, the dry gas sealing seat and the outer wall of the stirring shaft; the second sealing cavity is arranged between the cover plate and the bearing; the air inlet hole is formed in the supporting seat and is communicated with the second sealing cavity through an air path; the air outlet hole is formed in the supporting seat and the dry gas sealing seat and is communicated with the first sealing cavity; the air inlet is close to the stirring tank, and the air outlet is far away from the stirring tank. According to the utility model, the air outlet hole is arranged at the position closer to the stirring tank, so that gas is pushed from bottom to top, powder in the stirring tank can be effectively prevented from leaking into the connecting interior of the stirring shaft and the supporting seat, the powder is prevented from corroding equipment, the powder in the stirring tank can be prevented from leaking, and the precision of formula proportioning is ensured; the mixing effect can be effectively improved.

Description

Technical Field

[0001] This utility model belongs to the field of battery production technology, specifically relating to a sealing device and a mixer for a stirring tank. Background Technology

[0002] In recent years, due to the flammability of liquid batteries, solid-state batteries have received increasing attention from companies. Solid-state batteries use non-flammable solid electrolytes to replace flammable organic liquid electrolytes, which can significantly improve the safety of battery systems. At the same time, they can better adapt to high-energy positive and negative electrodes and reduce system weight, thereby achieving a simultaneous increase in energy density.

[0003] Solid electrolytes, as the core component of all-solid-state batteries, are key materials for preparing all-solid-state lithium batteries with high energy density, high cycle stability, and high safety performance. In the stirring equipment for solid electrolytes, one end of the stirring shaft is inserted into the stirring tank, and the other end of the stirring shaft needs to be connected to the drive mechanism. The stirring shaft and the stirring tank need to achieve rotational engagement while ensuring the sealing between them. If the sealing is not good, the powder in the stirring tank will enter the gap between the stirring shaft and the bearing under the action of gravity, causing an increase in friction between the two and reducing the service life of the components. In actual production, the sealing between the two has always been a difficult technical problem to solve. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing technologies in that it is difficult to seal between the stirring shaft and the mixing tank, and to provide a sealing device and mixer with better sealing performance for the mixing tank.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] As a first aspect, a sealing device for a mixing tank includes:

[0007] Support base; the support base is fixedly installed with the mixing tank, and the mixing shaft is rotatably installed in the support base through a bearing;

[0008] The dry gas sealing seat is fixedly installed on the support seat corresponding to the connection between the mixing tank and the mixing shaft.

[0009] A cover plate is placed on the lower end face of the dry gas sealing seat, forming a first sealing cavity with the dry gas sealing seat and the outer wall of the stirring shaft;

[0010] The second sealing cavity is disposed between the cover plate and the bearing;

[0011] An air outlet is provided on the support base and is connected to the air passage of the second sealing cavity;

[0012] An air inlet is formed on the support base and the dry gas sealing base, and communicates with the first sealing cavity;

[0013] The air inlet is located close to the mixing tank, and the air outlet is located away from the mixing tank.

[0014] Furthermore, an air film assembly is provided inside the first sealed cavity. When air is injected into the first sealed cavity through the air inlet and the stirring shaft rotates, a sealed air film is formed inside the air film assembly.

[0015] The air film assembly includes, from bottom to top, a first push ring, a first stationary ring, a moving ring, a second stationary ring, and a second push ring, which are sequentially sleeved on the stirring shaft;

[0016] The moving ring is interference-fitted with the stirring shaft and rotates with the stirring shaft; the first push ring, the first stationary ring, the second stationary ring, and the second push ring are all clearance-fitted with the stirring shaft and do not rotate with the stirring shaft.

[0017] Furthermore, it also includes an air source, which is connected to the air inlet via an air passage.

[0018] Furthermore, the support base includes a hollow support body, first connecting flanges fixedly disposed at both ends of the hollow support body, and a bearing seat disposed inside the hollow support body; the bearing is installed between the bearing seat and the stirring shaft;

[0019] Both the dry gas sealing seat and the cover plate are located above the bearing housing.

[0020] Furthermore, the dry gas sealing seat includes a second connecting flange fixedly connected to the support seat, an outer mating plate and an inner mating plate fixedly disposed on the second connecting flange; the outer mating plate is fitted and installed with the inner wall of the support seat, and the inner mating plate is fitted and installed with the stirring shaft.

[0021] Furthermore, at least one first sealing groove is provided on the outer wall of the outer mating plate that mates with the support base;

[0022] A first sealing ring is provided inside the first sealing groove.

[0023] Furthermore, at least one second sealing groove is provided on the inner wall of the moving ring near the stirring shaft; a second sealing ring is provided in the second sealing groove.

[0024] Furthermore, the cover plate includes:

[0025] Horizontal section;

[0026] The longitudinal portion is fixedly connected to the transverse portion;

[0027] The longitudinal section is fitted with the stirring shaft, and the transverse section abuts against the inner wall of the outer mating plate.

[0028] Furthermore, the cross-sections of both the first push ring and the second push ring are Z-shaped; a third sealing ring is provided between the first push ring and the first stationary ring, and between the second push ring and the second stationary ring.

[0029] As a second aspect, a mixer includes a base, a drive mechanism mounted on the base, a stirring shaft pulverizedly connected to the drive mechanism, a stirring mechanism mounted on the stirring shaft, and a mixing tank mounted on the base by a sealing device, the sealing device being a sealing device for the mixing tank as described above.

[0030] The beneficial effects of this utility model on a sealing device for a mixing tank and a mixer are:

[0031] This invention provides a sealing device for sealing the mixing tank and the mixing shaft. The device injects clean gas into the first sealing cavity through an air inlet. The gas flows towards the mixing tank through the dry gas sealing seat, pushing upwards and preventing powder from falling into the support base. This effectively prevents powder from leaking out of the mixing tank and entering the connection between the mixing shaft and the support base, thus avoiding corrosion of the equipment and preventing powder entering the mixing shaft and support base from increasing friction between components and reducing the equipment's lifespan. Furthermore, it prevents powder leakage from the mixing tank, ensuring the accuracy of the formula ratio and effectively improving the mixing effect.

[0032] Furthermore, this invention provides an air film assembly within the first sealed cavity, through which clean gas is injected. When the stirring shaft rotates, the moving ring follows the stirring shaft, while the first and second stationary rings remain stationary. Under high-speed rotation, a stable air film is formed on the contact surfaces between the first and moving rings and between the second and moving rings. The formation of the air film further prevents the powder in the mixing tank from entering the support base and the stirring shaft. Attached Figure Description

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0034] Figure 1 This is an installation diagram of the sealing device and stirring shaft according to Embodiment 1 of this utility model.

[0035] Figure 2 yes Figure 1 The main view.

[0036] Figure 3 yes Figure 2 Cross-sectional view at point AA.

[0037] Figure 4 This is a detailed drawing of the sealing device in Embodiment 1 of this utility model.

[0038] Figure 5 This is a schematic diagram of the sealing device in Embodiment 1 of this utility model.

[0039] Figure 6 This is a partial exploded view of the sealing device in Embodiment 1 of this utility model.

[0040] Figure 7 This is a schematic diagram of the dry gas sealing seat in Embodiment 1 of this utility model.

[0041] Figure 8 This is a schematic diagram of the cover plate in Embodiment 1 of this utility model.

[0042] Figure 9 This is a schematic diagram of the mixer according to Embodiment 2 of this utility model.

[0043] In the diagram: 1. Sealing device; 11. Support base; 111. Hollow support body; 112. First connecting flange; 12. Dry gas sealing seat; 121. Second connecting flange; 122. Outer mating plate; 123. Inner mating plate; 13. Cover plate; 131. Transverse part; 132. Longitudinal part; 14. First sealing cavity; 15. Second sealing cavity; 17. Air inlet; 16. Air outlet; 18. Air film assembly; 181. First push ring; 182. First stationary ring; 183. Moving ring; 184. Second stationary ring; 185. Second push ring; 19. First sealing groove; 20. First sealing ring; 30. Second sealing groove; 40. Second sealing ring; 50. Third sealing ring; 2. Mixing tank; 3. Mixing shaft; 4. Base; 5. Drive mechanism. Detailed Implementation

[0044] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0045] Example 1

[0046] like Figures 1-8The present invention provides a specific embodiment of a sealing device 1 for a mixing tank 2, comprising a support base 11, a dry gas sealing seat 12 fixedly installed on the support base 11 at the connection between the mixing tank 2 and the mixing shaft 3, an air inlet 17 disposed between a cover plate 13 and a bearing, and an air outlet 16 opened on the support base 11 and the dry gas sealing seat 12. The support base 11 is fixedly installed on the mixing tank 2, and the mixing shaft 3 is rotatably installed in the support base 11 via a bearing. During installation, the cover plate 13 covers the lower end face of the dry gas sealing seat 12, forming a first sealing cavity 14 with the dry gas sealing seat 12 and the outer wall of the mixing shaft 3. A second sealing cavity 15 is provided between the cover plate 13 and the bearing. The air outlet 16 is opened on the support base 11 and communicates with the air passage of the second sealing cavity 15. The air inlet 17 is opened on the support base 11 and the dry gas sealing seat 12 and communicates with the first sealing cavity 14. The air inlet 17 is located close to the mixing tank 2, and the air outlet 16 is located away from the mixing tank 2.

[0047] like Figures 1 to 3 As shown, in this embodiment, the support base 11 is installed below the mixing tank 2. The sealing device 1 in this embodiment is used to seal between the mixing tank 2 and the mixing shaft 3. The sealing device 1 injects clean gas into the first sealing cavity 14 through the air inlet 17, so that the gas is pushed upward from the first sealing cavity 14, preventing the powder in the mixing tank 2 from falling into the support base 11. This effectively prevents the powder in the mixing tank 2 from leaking into the mixing shaft 3 and the support base 11, avoiding corrosion of the equipment by the powder, and preventing the powder entering the mixing shaft 3 and the support base 11 from increasing the friction between the parts and reducing the service life of the equipment. On the other hand, it can prevent the powder in the mixing tank 2 from leaking, ensuring the accuracy of the formula ratio and effectively improving the mixing effect.

[0048] It should be understood that this embodiment also includes a gas source for providing clean gas. The gas source is connected to the air inlet 17 via a gas path. To ensure better sealing between the mixing tank 2 and the mixing shaft 3, an air film assembly 18 is provided in the first sealing cavity 14 in this embodiment. When the gas source fills the first sealing cavity 14 with gas through the air inlet 17 and the mixing shaft 3 rotates, a sealed air film is formed inside the air film assembly 18. Specifically, the air film assembly 18 includes a first push ring 181, a first stationary ring 182, a moving ring 183, a second stationary ring 184, and a second push ring 185, which are sequentially fitted onto the mixing shaft 3 from bottom to top. The moving ring 183 is interference-fitted with the mixing shaft 3 and rotates with the mixing shaft 3. The first push ring 181, the first stationary ring 182, the second stationary ring 184, and the second push ring 185 are all clearance-fitted with the mixing shaft 3 and do not rotate with the mixing shaft 3. See details below. Figure 4 .

[0049] Clean gas is injected into the first sealed cavity 14 through the air inlet 17. When the stirring shaft 3 rotates, the moving ring 183 rotates with the stirring shaft 3. At this time, the first stationary ring 182 and the second stationary ring 184 remain stationary. Under high-speed rotation, a stable gas film is formed on the contact surfaces between the first stationary ring 182 and the moving ring 183, and between the second stationary ring 184 and the moving ring 183. The formation of the gas film further prevents the powder in the stirring tank 2 from entering the connection between the support base 11 and the stirring shaft 3.

[0050] like Figure 2 and Figure 3 As shown, the support base 11 in this embodiment includes a hollow support body 111, first connecting flanges 112 fixedly disposed at both ends of the hollow support body 111, and a bearing seat disposed inside the hollow support body 111. The bearing is installed between the bearing seat and the stirring shaft 3, and the dry gas sealing seat 12 and the cover plate 13 are both disposed above the bearing seat. In this embodiment, the first connecting flange 112 disposed at the upper end of the hollow support body 111 is connected to the stirring tank 2, and the stirring shaft 3 passes into the stirring tank 2 from below.

[0051] like Figure 5 , Figure 7 and Figure 8 As shown, in a preferred embodiment, the dry gas sealing seat 12 includes a second connecting flange 121 fixedly connected to the support seat 11, an outer mating plate 122 and an inner mating plate 123 fixedly disposed on the second connecting flange 121; the outer mating plate 122 is fitted to the inner wall of the support seat 11, and the inner mating plate 123 is fitted to the stirring shaft 3. The cover plate 13 includes a transverse portion 131 and a longitudinal portion 132 fixedly connected to the transverse portion 131; the longitudinal portion 132 is fitted to the stirring shaft 3, and the transverse portion 131 abuts against the inner wall of the outer mating plate 122.

[0052] To avoid an installation gap between the support base 11 and the dry gas sealing base 12, at least one first sealing groove 19 is provided on the outer wall of the outer mating plate 122 that mates with the support base, and a first sealing ring 20 is provided in the first sealing groove 19. In this embodiment, two first sealing grooves 19 are provided. To avoid a small gap between the moving ring 183 and the stirring shaft 3, at least one second sealing groove 30 is provided on the inner wall of the moving ring 183 near the stirring shaft 3, and a second sealing ring 40 is provided in the second sealing groove 30. In this embodiment, one second sealing groove 30 is provided.

[0053] like Figure 5As shown, in this embodiment, the cross-sections of the first push ring 181 and the second push ring 185 are both Z-shaped. A third sealing ring 50 is provided between the first push ring 181 and the first stationary ring 182, and between the second push ring 185 and the second stationary ring 184. The first sealing ring 20, the second sealing ring 40, and the third sealing ring 50 are all rubber sealing rings.

[0054] Example 2

[0055] like Figure 9 This is a specific embodiment of a mixer used for pulverizing and mixing solid electrolytes. It includes a base 4, a drive mechanism 5 mounted on the base 4, a stirring shaft 3 connected to the drive mechanism 5, a stirring mechanism mounted on the stirring shaft 3, and a mixing tank 2 mounted on the base 4 via a sealing device 1. The sealing device 1 is a sealing device 1 for the mixing tank 2 as described above.

[0056] Using the mixer in this embodiment 2 to pulverize and mix solid electrolytes will not cause powder leakage in the mixing tank 2, ensuring the accuracy of the material mixing ratio, and the mixer has a long service life.

[0057] It should be understood that the specific embodiments described above are only for explaining the present invention and are not intended to limit the present invention. Obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A sealing device for a mixing tank, characterized in that, include: Support base (11); the support base (11) is fixedly installed with the mixing tank (2), and the mixing shaft (3) is rotatably installed in the support base (11) through a bearing; The dry gas sealing seat (12) is fixedly installed on the support seat (11) corresponding to the connection between the mixing tank (2) and the mixing shaft (3); The cover plate (13) is placed on the lower end face of the dry gas sealing seat (12) and forms a first sealing cavity (14) with the dry gas sealing seat (12) and the outer wall of the stirring shaft (3). The second sealing cavity (15) is disposed between the cover plate (13) and the bearing; An air outlet (16) is provided on the support base (11) and is connected to the air passage of the second sealing cavity (15); An air inlet (17) is provided on the support base (11) and the dry gas sealing base (12) and communicates with the first sealing cavity (14); The air inlet (17) is located close to the mixing tank (2), and the air outlet (16) is located away from the mixing tank (2).

2. The sealing device for a mixing tank according to claim 1, characterized in that, An air film assembly (18) is provided inside the first sealed cavity (14). When air is injected into the first sealed cavity (14) through the air inlet (17) and the stirring shaft (3) rotates, a sealed air film is formed inside the air film assembly (18). The air film assembly (18) includes: a first push ring (181), a first stationary ring (182), a moving ring (183), a second stationary ring (184), and a second push ring (185) sequentially sleeved on the stirring shaft (3) from bottom to top. The moving ring (183) is interference-fitted with the stirring shaft (3) and rotates with the stirring shaft (3); the first push ring (181), the first stationary ring (182), the second stationary ring (184) and the second push ring (185) are all clearance-fitted with the stirring shaft (3) and do not rotate with the stirring shaft (3).

3. A sealing device for a mixing tank according to claim 1, characterized in that, It also includes an air source, which is connected to the air inlet (17) via an air passage.

4. A sealing device for a mixing tank according to claim 1, characterized in that, The support base (11) includes a hollow support body (111), a first connecting flange (112) fixedly disposed at both ends of the hollow support body (111), and a bearing seat disposed inside the hollow support body (111); the bearing is installed between the bearing seat and the stirring shaft (3); The dry gas sealing seat (12) and the cover plate (13) are both located above the bearing seat.

5. A sealing device for a mixing tank according to claim 1, characterized in that, The dry gas sealing seat (12) includes a second connecting flange (121) fixedly connected to the support seat (11), an outer mating plate (122) and an inner mating plate (123) fixedly disposed on the second connecting flange (121); the outer mating plate (122) is fitted with the inner wall of the support seat (11), and the inner mating plate (123) is fitted with the stirring shaft (3).

6. A sealing device for a mixing tank according to claim 5, characterized in that, At least one first sealing groove (19) is provided on the outer wall of the outer mating plate (122) that mates with the support base (11). A first sealing ring (20) is provided in the first sealing groove (19).

7. A sealing device for a mixing tank according to claim 2, characterized in that, At least one second sealing groove (30) is provided on the inner wall of the moving ring (183) near the stirring shaft (3); a second sealing ring (40) is provided in the second sealing groove (30).

8. A sealing device (1) for a mixing tank (2) according to claim 5, characterized in that, The cover plate (13) includes: Transverse part (131); The longitudinal portion (132) is fixedly connected to the transverse portion (131); The longitudinal part (132) is installed in conjunction with the stirring shaft (3), and the transverse part (131) abuts against the inner wall of the outer mating plate (122).

9. A sealing device for a mixing tank according to claim 2, characterized in that, The cross-sections of the first push ring (181) and the second push ring (185) are both Z-shaped; a third sealing ring (50) is provided between the first push ring (181) and the first stationary ring (182), and between the second push ring (185) and the second stationary ring (184).

10. A mixer, characterized in that, It includes a base (4), a drive mechanism (5) mounted on the base (4), a stirring shaft (3) connected to the drive mechanism (5), a stirring mechanism mounted on the stirring shaft (3), and a stirring tank (2) mounted on the base (4) by a sealing device (1), wherein the sealing device (1) is a sealing device for a stirring tank as described in any one of claims 1-9.

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